All Questions
Tagged with refraction laser
27
questions
3
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3k
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Why does laser light not bend (refract) when it travels from air to water?
I passed green laser light from air to water but to my suprise the light doesn't bend towards normal even though I changed the angle of incidence.It goes undeflected ,Is it because of its higher ...
- 47
2
votes
1
answer
208
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Do high powered lasers refract differently than other light?
So I have a question: I am told that there are naval lasers that target over 100's of miles ship-to-ship (not ship to air). Someone asserted that powerful lasers would refract differently than light. ...
- 463
1
vote
0
answers
56
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Decoherence of a laser beam via oil emulsion
This is sort of a followup to an earlier question that I posted regarding how to destroy the temporal and/or spatial coherence of a laser beam. It was suggested to me that I could use a rapidly ...
- 366
2
votes
1
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38
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Why are $\rm ZnSe$ beam-combiners typically "optimized" for a 45º angle of incidence?
Everywhere I look it seems that $\rm ZnSe$ beam combiners (as the ones sometimes used in $\rm CO_2$ [10600nm IR] laser cutters) are "optimized" or designed to work at a 45º angle of ...
- 21
2
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0
answers
47
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Is it possible to measure the temperature of a candle by the diffraction method?
I am reading a book " Physics, Fun and Beyond" by Eduardo de Campos Valadares. In his book, he is mentioning about an experiment "bending laser beams with hot air." I am posting a ...
- 221
1
vote
1
answer
129
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Total internal reflection doesn't occur when it is supposed to
I figured out that when I aim a laser beam on my window at an arbitrary angle, the total internal reflection doesn't occur whatsoever. What's more, the refracted beam seems to be pretty intense. It ...
- 513
1
vote
1
answer
69
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Requirements for Z-scan or I-scan measurements of nonlinear optical materials
I am looking to understand what requirements there are for any version of Z-Scan technique or the I-scan technique. These techniques are used for measuring nonlinear absorption and nonlinear ...
- 21
0
votes
1
answer
79
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Why when looking at a laser's reflection the laser appears to have a ring of noise around the central beam?
When pointing my presentation laser at a semi glossy object like stained wood or my skin I see noise, almost like TV static (it also appears to be moving). Is this a property of the laser's refraction ...
- 103
2
votes
1
answer
203
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Reflectivity coefficients at dielectric interface
In the book Principles of Lasers by Orazio Svelto, at chapter 4.3 "Wave Reflection and Transmission at a Dielectric Interface", the author tells that
If the wave is initially in the medium ...
- 1,894
1
vote
2
answers
48
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Does Heisenberg uncertainty affect Snells law?
Assuming an ideal single frequency plane wave, we can determine the angle of retraction for the light beam.
But the more I make my pulse shorter, the less certain I am in the frequency and thus the ...
- 91
0
votes
3
answers
219
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Pointing a laser to a mirror on the moon in spite of refraction by earth's atmosphere
I was reading that the Apollo missions left a laser reflector (Mirror) on the moon for scientific use. Having read some of the controversy here and elsewhere about lasers being affected by refraction ...
0
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answers
31
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How close can refractive index be to one? Classical vs Quantum calculation?
How close can the refraction index of a gas be to one such that it can still be used in classical calculations?
For example imagine we have $n-1=10^{-22}$. In [1] I find
$n-1=\frac{\gamma_{mol}P}{2 ...
user255856
-3
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1
answer
724
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Bending a Laser Beam [closed]
We can bend a Laser beam by varying the refraction coefficient of the air.
We can bend a Laser beam by dispersing into the air small particles that have the same effect on the Laser Beam and small ...
- 182
3
votes
1
answer
65
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Why does the intensity of the scattered light vary when a monochromatic laser is shined into a transparent object?
When a laser is shined into a glass ball such as this video (link) or a bottle of water (link) the light is refracted through the whole transparent body. However, the intensity of the light scattered ...
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4
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2
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Why does a laser beam stay coherent when it passes through glass?
If I have a coherent laser beam and I shine it through some glass, the light will slow down because it will interact weakly with the atoms in the glass. However, the beam that comes out the other side ...
- 187